Police escorts Zaur Dadaev, believed to be one of five suspects in the killing of Boris Nemtsov, into a court room in Moscow, Russia, March 8, 2015. Five suspects in the killing of prominent Russian opposition figure Boris Nemtsov have been delivered to the court for arraignment, the spokeswoman for a Moscow court said Sunday. The statement by Anna Fedeeva to reporters outside the courthouse came one day after the Federal Security service said two suspects had been detained. Russian news agencies late Saturday reported that two others had been detained, and Investigative Committee spokesman Vladimir Markin said Sunday there was a fifth suspect. Details remain vague in the case despite President Vladimir Putin's pledge to pursue the killers vigorously. (AP Photo/Ivan Sekretarev) (The Associated Press)

Three men, from the left: Tamerlan Eskerkhanov, Shagid Gubashev and Khamzad Bakhaev suspected of involvement in the killing of Boris Nemtsov sit in a court room in Moscow, Russia, Sunday, March 8, 2015. A Russian court on Sunday charged two men in the killing of leading opposition figure Boris Nemts...